topquark

4 ms·

1.
by topquark 10y ago
Then you haven't been paying attention. This is a perennial topic for both Republicans and Democrats.
2.
by topquark 10y ago
Not so bad as that, but it is a large area, and it's a challenge for optical astronomers to detect a faint source in such a large patch of sky. It's about the size of your two palms held at arms length. (Or, 40 times the size of
3.
by topquark 10y ago
The localization isn't performed through parallax, it's done through triangulation and time-of-arrival. For a pair of observatories, a difference in the arrival time of a signal (moving at the speed of light) defines a circle on t
4.
Gravitational waves: how we did it(science20.com)
1 points by topquark 11y ago|0 comments
5.
by topquark 11y ago
It sounds like you've already read about how we estimate the false-alarm rate for signals, so I'll just add that the estimated rate of BBH mergers was highly uncertain before this observation; the error bars spanned three orders o
6.
by topquark 11y ago
In http://arxiv.org/abs/1602.03840 we describe the various parameters that we were able to measure for this signal, and in http://arxiv.org/abs/1602.03841 we compare the results to the predictions
7.
by topquark 11y ago
In addition to the two LIGO sites, there is the Virgo instrument outside of Pisa, Italy, which will come online later this year. The KAGRA detector is currently being assembled underneath a mountain in Japan. And, mentioned in another reply
8.
by topquark 11y ago
Another LIGO scientist here. It takes an overwhelming amount of energy to generate gravitational waves, and detecting them from terrestrial sources is about 20 orders of magnitude more difficult than the measurement we just made. Space, is
9.
by topquark 11y ago
LIGO scientist here. The way this is presented can be a little deceptive - the isolation is very frequency dependent. At high frequencies (>10Hz), the pendulums and blade springs in the suspension isolate the mirrors very well, so they a
10.
The Advanced LIGO Interferometers(arxiv.org)
1 points by topquark 12y ago|0 comments